| Tail Number / N-Number | N21987 |
| Manufacturer | PORTERFIELD |
| Model | CP-50 |
| Year Built | 1939 |
| Manufacturer's Serial Number | 570 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | A&C65 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Average Cruising Speed | 76 miles per hour |
| Type of Registrant | Co-Ownership |
| Owner Name | HAYDEN ROBERT E JR |
| Other Names |
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| Street | 675 S ABERDEEN ST |
| City | ANAHIEM HILLS |
| State | CA |
| Zip Code | 92807 |
| Region | Western-Pacific |
| County | Orange County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1959-07-07 |
| Certificate Issue Date | 2016-07-19 |
| Last Action Date | 2022-08-10 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 50357201 |
| Mode S Code Hex | A1DE81 |